Evaluation of a modification of the dada technique for the recovery of helminth eggs from soil, and determination of the specific gravity of certain helminth eggs using sucrose density gradient centrifugation / by Erwin Directo David.David, Erwin Directo January 2011 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries
Hilton, Stephen Homer
19 December 1974
Two 16 mm color films were made to help fill a general need for instructional motion pictures in the area of Parasitology. One film "Haemonchus contortus, a Sheep Stomach Worm," deals with a nematode parasite of sheep, showing all stages of its external development and including a time-lapse sequence of the embryonation of the egg. The other film, "Some Parasites of Freshwater Fishes," shows six parasites; Ichthyophthirius multifiliis, Cotylurus erraticus, Dactylogyrus sp., Lernaea cyprinacea, Trichodina sp., and Diplostomum spathaceum for the first time in motion pictures. The films were photographed through a Wild dissecting scope and a Reichert Universal Camera Microscope, employing the techniques of brightfield, darkfield, phase contrast and Nomarski interference microscopy. The films are available from the Parasitology Laboratory of the Department of Zoology at Brigham Young University.
Factors influencing the pinworm community (Oxyurida : Nematoda) parasitic in the hindgut of the American cockroach, Periplaneta americanaNoble, Stewart J. January 1991 (has links)
Large cockroaches, such as Periplaneta Americana, typically harbour in their hindgut two or more species of parasitic pinworm (Nematoda: Oxyurida). Our laboratory colony was infected with three, possibly four species. The mechanism(s) permitting the sympatry of these potentially competing species were investigated by: i) repeatedly sampling over time hosts of various size to determine the structure, if any, in the pinworm guild and ii) infecting uninfected hosts with known doses of infective eggs and monitoring population changes via daily host dissections. Results indicate that chemically-mediated intraspecific interference competition maintains pinworm populations at densities well below the apparent carrying capacity of the majority of hosts. The concomitant reduction of interspecific pressures thus permits the cohabitation of multiple pinworm species in what is essentially a single niche. This intraspecific population limitation is likely a response to pressures produced by the large size of the parasite in relation the hindgut of early instar hosts. / Science, Faculty of / Zoology, Department of / Graduate
Horak, Ivan Gerard.
09 September 2014
The seasonal fluctuations in the worm burdens of pigs, sheep, cattle, impala and blesbok exposed to infestation on improved or natural pastures in the Transvaal were determined. The prevalence of infestation in pigs slaughtered at the Pretoria Municipal Abattoir and in impala near Pafuri and blesbok at Badplaas was also established. Sheep, goats and cattle were successfully artificially infested with a number of nematodes of impala origin and sheep with those of blesbok origin. The various methods used to determine the seasonal incidence of helminth parasites are discussed and the wastage of valuable material criticised when complete recoveries of both internal and external parasites are not attempted at each necropsy. Host specificity and the distribution of parasites according to climate and the zoogeographical distribution of their hosts are discussed and the epizootiology of the major nematode genera parasitizing sheep, cattle, impala and blesbok in the Transvaal is determined. The phenomenon of arrested development in nematodes is compared with that of diapause in insects and measures to control helminth parasites 1n domestic stock and antelope in the Transvaal are suggested. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1980.
Marwi, Mohamed Abdullah, Suvajra Vajrasthira,
(has links) (PDF)
Thesis (M.Sc. Tropical Medicine))--Mahidol University, 1979.
Soil-transmitted helminths in schoolchildren in Grand Bois Haiti [electronic resource] : a prevalence study /De Pasquale, John M. January 2007 (has links)
Thesis (M.Ph.)--Georgia State University, 2007. / Title from title page. Karen E. Gieseker, committee chair; Russ Toal, Patrick J. Lammie, committee members. Electronic text (135 p. : ill.) : digital, PDF file. Description based on contents viewed October 10, 2007. Includes bibliographical references (p. 115-135).
Symons, Lawrence Eric Alexander
1v. (various pagings) : / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (D.Sc.1974) from the Dept. of Entomology, University of Adelaide
Thesis (Ph. D.)--University of Texas at El Paso, 2007. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.
Symons, Lawrence Eric Alexander.
(has links) (PDF)
Thesis (D.Sc.1974) from the Dept. of Entomology, University of Adelaide.
Parasites of feral cats and native fauna from Western Australia : the application of molecular techniques for the study of parasitic infections in Australian wildlife /Adams, Peter John. January 2003 (has links)
Thesis (Ph.D.)--Murdoch University, 2003. / Thesis submitted to the Division of Health Sciences. Bibliography: p. 195-239.
Page generated in 0.0477 seconds